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Symmetry
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Body Plan
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Digestion
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Transport within the Body
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Radial
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Neither acoelomate, psuedocoelomate or coelomate.
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Water is pumped in and out of the gastrovascular cavity; flagella on the gastrodermal cells help distribute nutrients.
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Gas Exchange
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Method of Waste Disposal
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Nervous System
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Reproduction
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Important Distinguishing Feature
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Oxygen diffuses across the surface.
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Undigested remains are egested through the mouth/anus.
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In most polyps (a type of cnidaria with tentacles), reproduction consists of asexual “budding”. Sexual formation of gametes is prevalent in medusas (cnidaria that moves by contractions of its bell-shaped body) and some polyps.
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